public class Test1 {
    public static void main(String[] args) throws InterruptedException {
        Thread t=new Thread(()->{
            for(int i=0;i<5;i++){
                System.out.println("我是一个线程，我正在工作");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
            System.out.println("线程执行结束");
        });
        t.start();
        t.join();
        System.out.println("这是主线程，期望在线程t结束之后打印");
    }
}
